Kitz Forum
Broadband Related => Broadband Hardware => Topic started by: adslmax on May 02, 2015, 01:59:26 PM
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Here is interesting between Netgear D6400 and Billion 8800NL. As Billion come out the better on both (SNR and Attainable) better than Netgear.
Netgear D6400
Max: Upstream rate = 35059 Kbps, Downstream rate = 103345 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 79999 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 11.6 15.8
Attn(dB): 11.1 0.0
Pwr(dBm): 12.4 -1.0
Interleave depth: 16 8
INP: 46.00 47.00
G.INP: Enabled
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Billion 8800NL
Max: Upstream rate = 35386 Kbps, Downstream rate = 103951 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 79999 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 11.8 16.0
Attn(dB): 11.4 0.0
Pwr(dBm): 12.4 -1.0
Interleave depth: 16 8
INP: 46.00 47.00
G.INP: Enabled
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Hi
The difference on maximum attainable isn't enough to be conclusive really. When the Billion sync'd it found a little bit more margin on the line and translated that into a bit more attainable, but the difference is so small and SNR isn't a fixed figure anyway. Was it just luck when the Billion connected that noise was a little lower?
You would need to sync many times each one and check the results are repeatable, and even if they are, on another line the results might be in favour of the other.
Regards
Phil
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Yeah I suppose u are right. Anyway the Netgear D6400 went back to pcworld for full refunded. All done. I only brought Netgear D6400 to testing that all. :)
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Is the ZyXEL telnet interface the standard Broadcom one or is it customised?
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How do you find it performs on your line Kitz?
Is it fully G.INP-ready?
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I have a VMG8324 but I personally find it works very well on my line, so Im talking from the perspective of the VMG8324. The VMG1312 is only 10/100, which rules out one of my important personal requirements and spec wise its a little brother to the VMG8324, but DSL performance based on its chip should be the same.
Some versions of the f/w have been a bit wonky but I stick to an older version which I find stable.
It gives me circa 3.5Mbps more headline sync than the HG612 which in turn also gives 3.5Mbps more than the lantiq chips despite being on an ECI cab. I posted some stat comparisons in the review on the main site. There's also some stats knocking around from about Oct last year when I had a line fault as I put the HG612 for a short while, but switched back to the Zyxel as it was producing less Err/Secs than the HG612.
However I cant stress enough that performance of routers varies from line to line. les-70 had a vmg8323 which gave him more Err/Secs than the HG612 although it did sync at a higher rate. Generally speaking on most lines it does seem to eke out a bit more speed, the major complaint about it seems to be silly f/w bugs in some versions.
Is it fully G.INP-ready?
VMG8324 is full G.inp and G.Vector ready.
Theres a couple of the regs on here who use a VMG8324 and who had no g.inp issues with it working straight away with g.inp Mk1.
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The ZyXEL VMG8324 is available from Eclipse (http://www.eclipse.net.uk/products/connect/broadband/broadband-hardware/) for £54.17...
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The ZyXEL VMG8324 is available from Eclipse (http://www.eclipse.net.uk/products/connect/broadband/broadband-hardware/) for £54.17...
Plus VAT.
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From the aawiki:
When supplied by AAISP, the router will be in the 'AAISP default settings' state.....
To erase the default AAISP settings, the 'ROM-D' needs to be cleared, this is done via the CLI (Telnet or SSH) using the supervisor user and then issuing the save_default clean command."
http://support.aa.net.uk/VMG1312:_Factory_Reset
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Plus VAT.
Ah, I did not see that! :)
Including VAT and delivery, the total price would appear to come to £73.99, then.
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The Zyxel VMG1312 is available from the Andrews and Arnold Shop for £60
http://aa.net.uk/broadband-accessories.html
Any reason this model VMG1312-B (https://www.alza.co.uk/zyxel-vmg1312-b-d2122159.htm) wouldn't work in the UK? It's £41.57, Annex B, and a lovely shade of ... white. Alza are apparently the Czech version of Argos and I've actually ordered a pretty large monitor from them in the past with no problems, and while playing with the order they gave me a £5 discount code for signing up for their newsletter - which cancels out their shipping of £4.90.
EDIT:
Ah, this is a VMG1312-B30B which does VDSL/ADSL2+ over ISDN , so I've answered my own question. ::)
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Annex B is the reason. Annex A is used in the UK.
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My excuse for getting my annexes mixed up is I'm currently fiddling with VDSL stats on a Juniper router and it's telling me I'm on Annex B - and this post from Asbokid (http://forum.kitz.co.uk/index.php?topic=11188.15;wap2), unless I'm reading it wrongly ???
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I must admit, I thought UK VDSL used Annex B too :shrug2:
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I like to think of it as two separate types of Annexes! ;)
- That of the "infrastructure": Annex A is Internet over POTS & Annex B is Internet over ISDN. The UK is Annex A.
- That of the various forms of xDSL: As previously discussed by Asbokid and others, Beattie Bellman's VDSL2 based service is Annex B.
So for a UK resident (let's say AlecR) with a FTTC based service, which is using VDSL2 over the final link metallic pathway, the "Type 1" Annex is A and the "Type 2" Annex is B.
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Now I'm even more confused :(
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When talking about modems, the UK uses Annex A (xDSL over POTS) and some other countries such as Germany use Annex B (xDSL over IDSN).
Please understand that annex simply means appendix. Technical documents often have appendices, which we refer to as Appendix 1, etc.. In continental Europe, in the English translations of technical documents, these appendices are referred to as Annex A, etc.. I believe this was the result of a piece of bad translation years ago which became standard practice.
So the Annex A which we're talking about here refers to an appendix to a certain technical document which defines part of the internet infrastucture. The Annex B referred to by Asbokid and others refers to an appendix to a different technical document which defines types of xDSL.
Modems which describe themselves as Annex A or Annex B are talking about the infrastucture documents.
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And some of the annexes are about optional features. Annex M for example, an add-on.
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Which technical document(s) is/are the infrastructure documents?
G.992.1, G.992.3 and G.993.5 all have their Annex A about ADSL over POTS
G.993.2 has Annex A about Region A - North America, and Annex B about Region B - Europe, and then within Annex B it's got different bandplans to be used when operating in the presence of ADSL over POTS or ADSL over ISDN.
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Kitz,
Would you be able to confirm which firmware you use for the ZyXEL VMG8324?
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Which technical document(s) is/are the infrastructure documents?
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I'm not competent to answer this. I was just talking in general terms to try to explain what Annex A, etc., actually means.
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Kitz,
Would you be able to confirm which firmware you use for the ZyXEL VMG8324?
I rolled back to 6b1 which was the version before they limited the no of telnet logins
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Ive split this topic off. The other thread is supposed to be to report new combined VDSL modem/routers and any details such as price so it can be added to the main list so I can keep track of whats going on and keep the front post updated.
Most routers should have their own discussion thread and if you wish to ask about performance or which router to buy please start a separate thread.
Thanks :)